TEHRAN, Jan. 8 (Xinhua) -- The interim deal on Iran's nuclear program will go into effect only after Tehran and the six world powers reach a mutual agreement on how to implement the provisions of the deal, Iranian nuclear negotiator Abbas Araqchi was quoted as saying by Tehran Times daily on Wednesday.

"January 20 has been proposed as the implementation date and the two sides are making preparations for it, but fixing this date is conditional that reaching a mutual agreement on the remaining issues is a prerequisite," Araqchi said.

He would most likely hold a meeting with Helga Schmid, a deputy of European Union foreign policy chief Catherine Ashton, to discuss some remaining issues this week, he said according to the report.

Iran and the P5+1 group, the five permanent members of the UN Security Council plus Germany, clinched a landmark deal in Geneva on November 24 according to which Iran agreed not to freeze part of its nuclear program for six months in exchange for limited sanctions relief.

The agreement is designed to provide time to negotiate a comprehensive deal to help resolve the dispute over Iran's nuclear program.

Iran has held three rounds of expert-level meetings with the P5+ 1 group in Geneva to work out the implementation of the nuclear accord.